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4 pe 104-4 pe103-3*2 pe206=

Răspuns :

[tex] \frac{4}{104}- \frac{4}{103}-3* \frac{2}{206}= \frac{4}{104}- \frac{4}{103}- \frac{6}{206}= \frac{412}{10712}- \frac{416}{10712}- \frac{312}{10712}=- \frac{316}{10712} [/tex]
[tex]=- \frac{79}{2678} [/tex]